Yes, customs will affect you. On the door to port option you will need to declare your shipment at customs, often you will need to contract a third party service. With the door to door option our destination agent will do the customs clearance based on the documents you provided (valued inventory, passport/visa/work permit copy, personal effects declaration form (if any),… .
Most countries, including Australia, New-Zealand and USA offer a tax and duty free allowance for returning residents and settlers who send unaccompanied baggage containing personal clothing & personal effects which are for their sole use and which have been owned by them for a minimum of 6 months. Not all countries offer this allowance.
It is the sender’s responsibility to ensure that you are aware of your own personal circumstances, what you are sending and the prevailing customs regulations of the destination country will affect the categorisation of your shipment and consequently whether you will be liable to pay customs duties, taxes or local charges.
We can check if you have complied with the destination customs regulations and advice you. Ultimately we recommend every customer sending outside of the EU takes 5 minutes to check the regulations for their destination directly with the destination country’s official travel advice line/customs office.
Popular related question: What information do I need to provide for customs for duty free clearance?